Patents by Inventor Bernard H. Refson

Bernard H. Refson has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fluid displacement
    Patent number: 4193398
    Abstract: An extracorporeal osmotic pump has a first chamber containing an osmotic fluid e.g. aqueous polyethylene glycol solution and a second chamber containing a weaker solution or solvent e.g. water. Between the two there is a duct containing the semipermeable membrane and nearer the first chamber one or more layers of porous material (e.g. four contiguous face-to-face discs of porous polyethylene) as a flow-control means.
    Type: Grant
    Filed: May 25, 1978
    Date of Patent: March 18, 1980
    Assignee: Watson-Marlow Limited
    Inventor: Bernard H. Refson